Lever-derrick



(Nd Model.) v

. O. H. MITCHELL.

LEVER DERRICK.

No. 281,639. Patepted July 17, 1883. R

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R "ER Q o a Q U Biz/265565; Ewe/Zion 5 UNITED STATES PATENT OrFIcE.

- OBED H. MITCHELL, or SPRINGFIELD, MISSOURI.

LEVER-DERRICK.

SPECIFICATION forming part of Letters Patent No. 281,639, dated July 1'7, 1883.

(No model.)

able others skilled in the art to which it appertains to make and use the Same, reference being had to the accompanying drawings, and to the letters and figures of reference, marked thereon, which form a part of this specification.

My invention relates to improvements in lever-derricks. It is to provide a cheap, easy, convenient, and rapid means of stacking hay or straw from the ground or wagon. This object I attain by means of the device illustrated in the accompanying drawings, in which- Figure 1 is a view of theentire device in elevation; Figs. 2, 3, and 4, detail views.

The device consists of the base A, supporting the lever F, with the attachments for lifting-rope at h and the pulling-rope at h the adjusting-ball P, stay-circle D D, track-circle O O, and the compound pulley G and hook H.

The base A is composed of the pieces a a, intersected by the crosspieces b b and c c 0 forming the frame A, which is made of convenient dimensions to fit a wagon, to be used as a rack for hauling hay when not used in the derrick. convenient height and rests upon the piece d, mortised and bolted therein. It is stayed by four inclined braces, e e 6' e fastened in shoes 'r at the top and bolted at the bottom. In the top is set a deep thimble, 0, in which turns the forked pivot-block E. The lever F rests in the fork of the pivot E, with bearings on the bolt t. The plates q are to form bearings, and to prevent the wearing of the parts the lever is made any suitable length, and, when necessary, may be spliced, as shown in Fig. 3, by means of two plates, (1 and q, and the clamps q. The lever is bridged (g) to give it strength. The bridge extends over the end of the lever at m, and through it the bolts h h pass. The swivel a: is to tighten the bridge.

The track-circle O O is made of iron, steel, or other suitable material, and is attached to the braces e e e by means of the hooked bolts The standard 13 is made of any f,-having nuts 011 the under side of the braces. The stay-circleD D is made of similar material and similarly attached to the same braces. These circles are to facilitate the turning of the lever.

The compound pulley G is made with a swivel, Z, as shown in Fig. 4, so that one part works on the track-circle O C, and through the other passes the pulling rope j. The braces e e are bolted to the pieces 1), thereby giving to each of the circles O and D more than a quadrant. This gives the advantage of Swinging the fork beyond the middle of the stack when desired. The compound pulley is made so that it can easily be changed from one side to the other of the brace e by means of the keyed bolt through the wheel of the part at for convenience in stacking on both sides of the derrick. The stay-rope t is also changed with the pulley. The pulley may be attached at G, as shown, when it is not convenient to operate the lever by the horse. In this case the hook H is used, working on the track-circle, having a roller, '1, to enable it to slide easily. The stay-rope 13 attaches the lever to the compound ring 2 of the stay-circle D, so that the end It will go sufficiently low to let a fork at a reach the hay to be pitched, whether from the ground or wagon. It also prevents all pulling on the horse when inthat position.

The pulling-rope j is provided with an adjustable ball, P, by means of the clamp '10, or other Suitable device, to suit the height of the stack, that the horse at m need go but ashort distance when the Stack is low.

When the hook H is used, the ball is so placed that the hook may catch over thetrackcircle, it being managed by the rope j attached to the lower back part of the hook, as shown. The hook is made large, long, and heavy, and when caught the horse is brought back to position and the lever is swung over the stack by the rope j, and back again by the trip-rope j and by pulling the rope 3' the hook is loosened and the lever lowered to position again for loading the fork. The work is much easier and simpler when all done by the horse. In this case the compound pulley G is on the track-circle O. The horse at m moves back until the fork is raised the desired height, as indicated by the ball 1?. Then the horse is swung, which moves the pulley G fromf to f This swings the pivoted lever F and brings the fork a over the stack, where it is unloaded by the trip-rope. The horse returning to position brings the horse back for another load. Thus the horse moves through but little space and performs all the work. Any hay-fork may be used with it, and it may be made any convenient size to suit the desired height of stacking. Stakes through the clcvises o prevent its tipping sidewise. It is so constructed that it can be easily and quickly moved on runners inthe field, or taken to pieces and loaded on a wagon and moved any distance.

Having described my invention and its mode of operation and construction, what I claim as new, and desire to secure by Letters Patent, 1s

1. In alevcr-derrick, a frame, A, with braces c e c 0, standard B, and bridged and pivoted lever F, all substantially as shown and described.

2. In a lever-derrick, a track-circle, O C, and a sta -circle, D D, compound pulley G, stay-rope z, hook H, with roller 3 pullingrope j, with ball P, and ropes j, j and i, all substantially as shown and described, for the purpose set forth.

3. A lever-derrick consisting of a base, A, frame A, standard B, pivoted bridged lever F, circles G C and D D, attachments f, stay rope 1 hook H, with roller 1 and rope pulling-rope j, with ball 1 and compound pulley G, all substantially as shown and described, for the purpose set forth.

In testimony whereof I affix my signaturein presence of two witnesses.

OBED H. MITCHELL.

W itnesscs:

A. F. INGRAM, A. W. MoPnnnsoN. 

